Allows consumers to upgrade from a Fulton Center-Bolt Swivel Mount Jack to an F2 Jack Fits Fulton's patented center-bolt design used on XP10 and XP15 weld-on jacksMaintains the smooth factory appearance of your trailerMount is tapered, moving wheel closer to trailer frame to optimize casteringInstalls easily-no drilling or weldingAll mounting hardware includedLimited 5 year warranty